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NOTES ON INORGANIC CHEMISTRY. GEORGE M~K E R , in a recent Comptes Rendus, calls attention to the fact that, while fused sulfate of ammonium or the alkaline halids have little or no effect on platinum, a mixture of ammonium sulfate and bromid or potassium bromid corrodes the metal very rapidly. Platinum black or even finely divided metallic platinum, is ra(pid1y brought into combination with this mixture a t 330°, the bromo-platinate of ammonium being formed. The other metals of the platinumdoi:10.1126/science.7.164.237-a pmid:17831905 fatcat:6m52hddzfvd3nl33un4pjnrbri